Natural & Organic Agriculture, Horticulture, and Hydroponic Products for Healthier Soil and Plants

Plant Doctor provides an extensive range of natural, organic, and traditional products tailored for agriculture, horticulture, and hydroponics. Our products are designed to promote healthier soils, plants, and food production by leveraging the power of nature and science.

Plant Doctor provides an extensive range of natural, organic, and traditional products tailored for agriculture, horticulture, and hydroponics. Our products are designed to promote healthier soils, plants, and food production by leveraging the power of nature and science.

Our Fertiliser Range Includes:

  • Organic Fertilisers: Ideal for environmentally conscious farming and gardening.
  • Liquid/Soluble Fertilisers: Easy to apply and fast-acting solutions for precise nutrient delivery.
  • Controlled-Release Fertilisers: Long-lasting formulas to sustain plant nutrition.
  • Granular Fertilisers: Perfect for large-scale applications, providing balanced and consistent nutrition.
  • Mineral Fertilisers: Enhancing soil fertility and plant growth with vital nutrients.

Among Our Standout Products Are:

  • Seaweed Secrets: A powerful liquid concentrate derived from seaweed and kelp, delivering essential nutrients to plants and soil microbes.
  • Stimulizer: A premium concentrated fulvic acid product that enhances nutrient availability and soil health.
  • Powdered Organic Fertilisers: Includes seaweed extracts, fulvic acids, and humic acids, which are key to building robust, nutrient-rich soils.

To Complement Our Fertiliser Range, We Offer Specialty Products Such As:

  • Natural Soil Conditioners: Improve soil structure, fertility, and microbial activity.
  • Soil Wetters and Wetting Agents: Enhance water penetration and distribution, ensuring plants receive the hydration they need.

Why Choose Plant Doctor for Agriculture and Horticulture?

  • Scientifically Proven: Our products are developed using cutting-edge research and natural ingredients for optimal results.
  • Eco-Friendly Formulations: We prioritise sustainability with organic and biodegradable inputs that benefit both the environment and your crops.
  • Versatile Solutions: Whether you’re growing food, flowers, or turf, our range supports healthier soil, improved yields, and robust plant health.
  • Australian Conditions: Designed to perform exceptionally well under the unique challenges of Australian agriculture and horticulture.

Explore Our Range of Agriculture & Horticulture Products

At Plant Doctor, we’re committed to supporting farmers, horticulturists, and hydroponic growers with world-class products to meet every need. From essential nutrients to soil-enhancing solutions, we offer a wide variety of options to ensure your plants and crops thrive.

Browse our full range below to discover how our Seaweed Secrets, Stimulizer, and other innovative solutions can transform your growing operations. Let Plant Doctor help you achieve healthier soils, stronger plants, and higher yields today!

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CHAMPION Lawn & Fairway | Slow Release Granular Lawn Fertiliser (2-4mm)

CHAMPION Lawn & Fairway | Slow Release Granular Lawn Fertiliser (2-4mm)

15-3-9 NPK + Minerals Sustained Lawn Health & Colour Fixes Patchy, Weak Turf Performance
Lawns
From $39.95

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Humate / Humic Acid (45-50%) | Granules (2-4mm) For Lawns and Gardens | Cert. Organic

Humate / Humic Acid (45-50%) | Granules (2-4mm) For Lawns and Gardens | Cert. Organic

45–50% Humic Acid Granules Builds Soil Structure & Retention Fixes Nutrient Loss & Poor Soil Health
LawnsGardensFarms
From $29.95

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Worm Magic Casting Pellets | Organic Slow Release Fertiliser | 6mmx10mm

Worm Magic Casting Pellets | Organic Slow Release Fertiliser | 6mmx10mm

Worm Castings Organic Pellets Builds Living Soil & Long-Term Fertility Fixes Depleted, Low-Biology Soil
LawnsGardensFarms
From $49.95

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Seaweed Secrets | Concentrated Liquid Seaweed (Kelp) for plants and lawns | Super-Boosted with Humic & Fulvic Acid

Seaweed Secrets | Concentrated Liquid Seaweed (Kelp) for plants and lawns | Super-Boosted with Humic & Fulvic Acid

Seaweed + Humic + Fulvic Biostimulant Improves Stress Resistance & Root Growth Fixes Plant Stress & Slow Recovery
LawnsGardensFarms
From $17.95

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Stimulizer | Fulvic Acid Biostimulant For Lawns and Gardens | Super concentrate natural chelating agent

Stimulizer | Fulvic Acid Biostimulant For Lawns and Gardens | Super concentrate natural chelating agent

Fulvic + Humic Bio-Stimulant Complex Maximises Nutrient Uptake & Growth Efficiency Fixes Poor Fertiliser Response & Weak Growth
LawnsGardensFarms
From $12.95

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VolcaMin (clinoptilolite Zeolite) - Agriculture Grade 1-2mm

VolcaMin (clinoptilolite Zeolite) - Agriculture Grade 1-2mm

Clinoptilolite Zeolite (High CEC) Improves Water & Nutrient Efficiency Fixes Fertiliser Leaching & Loss
LawnsGardensFarms
From $24.95

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VolcaMin (clinoptilolite Zeolite) - Horticulture & Agriculture Grade - 2-4 mm

VolcaMin (clinoptilolite Zeolite) - Horticulture & Agriculture Grade - 2-4 mm

Clinoptilolite Zeolite (High CEC) Improves Water & Nutrient Efficiency Fixes Fertiliser Leaching & Loss
Farms
From $69.95

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VolcaMin Zeolite - Agriculture Grade < 1.0mm Powder

VolcaMin Zeolite - Agriculture Grade < 1.0mm Powder

Clinoptilolite Zeolite (High CEC) Improves Water & Nutrient Efficiency Fixes Fertiliser Leaching & Loss
LawnsGardensIndoor
From $19.95

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Fulvic Acid | Liquid Plant Biostimulant and Chelator

Fulvic Acid | Liquid Plant Biostimulant and Chelator

Fulvic Acid Chelating Agent Boosts Nutrient Uptake Fixes Locked Nutrients & Poor Response
LawnsGardensFarms
From $19.95

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Humic acid 80% (Humate) | Soluble Powder for Lawns and Gardens

Humic acid 80% (Humate) | Soluble Powder for Lawns and Gardens

80% Humic Acid - 99% Soluble Boosts Fertiliser Efficiency Fixes Locked Nutrients & Poor Soil Response
LawnsGardensFarms
From $99.95

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Quantum H® | Liquid Humic Acid Soil Conditioner for Lawns and Gardens

Quantum H® | Liquid Humic Acid Soil Conditioner for Lawns and Gardens

Humic + Fulvic Soil Concentrate Boosts Soil Function & Nutrient Uptake Fixes Tired, Locked-Up Soils
LawnsGardensFarms
From $19.95

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Activ8mate | 8-1-4 | Liquid Lawn & Garden Fertiliser and Innoculant

Activ8mate | 8-1-4 | Liquid Lawn & Garden Fertiliser and Innoculant

8-1-4 NPK + T/E Soil Activation Root & Recovery Support
LawnsGardensFarms
From $22.95

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Fulvic Acid | Powder >92%  | Certified Organic Premium Soluble Concentrate | Potassium Fulvate

Fulvic Acid | Powder >92% | Certified Organic Premium Soluble Concentrate | Potassium Fulvate

92% Fulvic Acid Powder Boosts Nutrient Uptake Efficiency Fixes Locked Nutrients & Fertiliser Waste
LawnsGardensFarms
From $34.95

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Flowers, Fruits & Roots | 8-2-20 with silica | Granular Garden Fertiliser | High Potassium

Flowers, Fruits & Roots | 8-2-20 with silica | Granular Garden Fertiliser | High Potassium

8-2-20 NPK + T/E Flowering & Fruiting Boost Fixes Poor Flowering & Yield
GardensFarms
From $49.95

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Iron Chelate | EDTA Microgranules | 13% for Yellow Leaves

Iron Chelate | EDTA Microgranules | 13% for Yellow Leaves

EDTA Chelated Iron (Fe 13%) Fast Greening & Chlorosis Correction Fixes Iron Lock-Up & Yellowing
LawnsGardensFarms
From $39.95

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Iron Sulphate Heptahydrate Powder | For Lawns & Moss Control | Soluble Slow release powder

Iron Sulphate Heptahydrate Powder | For Lawns & Moss Control | Soluble Slow release powder

Iron Sulphate (Fe 19.5% + S 11.5%) Restores Deep Green Colour Fixes Iron Deficiency & Yellowing
LawnsGardensFarms
From $29.95

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MaxGreen | Liquid Iron and Nitrogen Lawn Green-Up Fertiliser

MaxGreen | Liquid Iron and Nitrogen Lawn Green-Up Fertiliser

16-0-0 NPK + 5% Iron, 2% Sulphur & Fulvic Fast Green-Up & Colour Boost Fixes Yellow, Weak Lawns
LawnsGardensFarms
From $24.95

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Roots, Shoots & Leaves | 16-2-10 | Controlled Release Granular Plant Fertiliser

Roots, Shoots & Leaves | 16-2-10 | Controlled Release Granular Plant Fertiliser

16-2-10 NPK All-Purpose Green Growth Fixes Weak, Patchy Growth
LawnsGardensFarms
From $17.50

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Lawn Envy Lawn Tonic | Fertiliser, Iron & Seaweed

Lawn Envy Lawn Tonic | Fertiliser, Iron & Seaweed

8-1-3 NPK + Iron All-In-One Lawn Solution Fixes Dull, Patchy Lawns
LawnsGardensFarms
From $29.95

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Activ8EXTRA | 16-2-5 | High Nitrogen Liquid Lawn and Garden Fertiliser

Activ8EXTRA | 16-2-5 | High Nitrogen Liquid Lawn and Garden Fertiliser

16-2-5 NPK + T/E & Seaweed Fast Green-Up & Growth Fixes Yellow, Weak Lawns
LawnsGardensFarms
From $24.95

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Gypsum Granules for Clay Soil Improvement | 1–2mm Mini Prill | Soil Conditioner with Calcium and Sulphur

Gypsum Granules for Clay Soil Improvement | 1–2mm Mini Prill | Soil Conditioner with Calcium and Sulphur

Calcium Sulphate (Ca + S) Improves Soil Structure & Drainage Fixes Clay & Compacted Soil
LawnsGardensFarms
From $29.95

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Micronised Gypsum | Liquid Gypsum Soil Conditioner for Clay & Sodic Soils

Micronised Gypsum | Liquid Gypsum Soil Conditioner for Clay & Sodic Soils

Micronised Calcium Sulphate (Ca + S) Improves Soil Structure & Aeration Fixes Clay, Compaction & Drainage Issues
LawnsGardensFarms
From $29.95

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Liquid Iron | Lawn Fertiliser | 7% Iron + 3% Sulphur | Supercharged with Fulvic Acid

Liquid Iron | Lawn Fertiliser | 7% Iron + 3% Sulphur | Supercharged with Fulvic Acid

7% Fe + 3% S Rapid Green-Up Fixes Yellowing & Iron Deficiency
LawnsGardensFarms
From $19.95

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Nature's Soil Wetter | Granules for Lawns and Gardens | Mineral infused with plant-derived non-petrochemical surfactant

Nature's Soil Wetter | Granules for Lawns and Gardens | Mineral infused with plant-derived non-petrochemical surfactant

Natural Granular Wetting Agent Improves Water Penetration & Retention Fixes Dry Patches & Hydrophobic Soil
LawnsGardensFarms
From $19.95

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Not sure which product you need?

Tell us what you’re working with and the Product Guide will suggest what to start with, then what to add.

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Money Back Guarantee

Money Back Guarantee

Put your mind at ease with our 100% 90 day money back guarantee

Australian Owned

Australian Owned

Australian family owned and operated. Online sales since 2009.

Flat Rate Shipping

Flat Rate Shipping

Flat-rate shipping from $9.95* Fast and affordable!

$9.95 orders under 1kg/1L • $14.95 orders up to 50kg • $49.95 orders over 50kg. Does not include express. Some location exclusions apply.
View shipping policy for more info

FAST Dispatch

FAST Dispatch

Quick and reliable dispatch Australia-wide*

*Monday - Friday (Excludes Public Holidays)

Customer Reviews

First time owning lawn. Gave the team at plant doctor a ring and they supplied me with a wealth of information. Products turned up quickly.

Will definitely be getting more 8 weeks difference been using stimulizer, activ8mate, soil wetter, seaweed secrets and champion fertiliser. Was super fast delivery.

Only have great things to say about Plant Doctor. Organic products and a competitive price, fast shipping and easy to contact with questions. Have had great results with the special mix for lawns, and my plants (indoor and outdoor) love the seaweed secrets. I am excited to test out some of the animal products soon!